﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using WP7DSMClient.ViewModel;

namespace WP7DSMClient
{
    /// <summary>
    /// Main application.
    /// </summary>
    public partial class App : Application
    {
        #region Public properties

        /// <summary>
        /// Easy access to the root frame
        /// </summary>
        public PhoneApplicationFrame RootFrame { get; private set; }

        #endregion

        #region Constructor


        /// <summary>
        /// Initializes the application.
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            // Note that exceptions thrown by ApplicationBarItem.Click will not get caught here.
            UnhandledException += Application_UnhandledException;

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();
        }

        #endregion

        #region Application lifecycle handling methods

        /// <summary>
        /// Code to execute when the application is launching (eg, from Start).
        /// This code will not execute when the application is reactivated.
        /// </summary>
        /// <param name="sender">Object sending the message.</param>
        /// <param name="e">Arguments of the message.</param>
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
        }


        /// <summary>
        /// Code to execute when the application is activated (brought to foreground).
        /// This code will not execute when the application is first launched.
        /// </summary>
        /// <param name="sender">Object sending the message.</param>
        /// <param name="e">Arguments of the message.</param>
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
        }


        /// <summary>
        /// Code to execute when the application is deactivated (sent to background).
        /// This code will not execute when the application is closing.
        /// </summary>
        /// <param name="sender">Object sending the message.</param>
        /// <param name="e">Arguments of the message.</param>
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
        }

        /// <summary>
        /// Code to execute when the application is closing (eg, user hit Back).
        /// This code will not execute when the application is deactivated.
        /// </summary>
        /// <param name="sender">Object sending the message.</param>
        /// <param name="e">Arguments of the message.</param>
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
            ViewModelLocator.Cleanup();
        }

        #endregion

        #region Error handling methods
        
        /// <summary>
        /// Code to execute if a navigation fails.
        /// </summary>
        /// <param name="sender">Object sending the message.</param>
        /// <param name="e">Arguments of the message.</param>
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // A navigation has failed; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }
       
        /// <summary>
        /// Code to execute on Unhandled Exceptions.
        /// </summary>
        /// <param name="sender">Object sending the message.</param>
        /// <param name="e">Arguments of the message.</param>
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        #endregion
        

        #region Phone application initialization
        
        /// <summary>
        /// Avoid double-initialization.
        /// </summary>
        private bool phoneApplicationInitialized = false;

        
        /// <summary>
        /// Do not add any additional code to this method.
        /// </summary>
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render.
            RootFrame = new PhoneApplicationFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;

            // Handle navigation failures
            RootFrame.NavigationFailed += RootFrame_NavigationFailed;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        
        /// <summary>
        /// Do not add any additional code to this method. 
        /// </summary>
        /// <param name="sender">Object sending the message.</param>
        /// <param name="e">Arguments of the message.</param>
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame.Navigated -= CompleteInitializePhoneApplication;
        }

        #endregion
    }
}
